Direct fitness benefits of delayed dispersal in the cooperatively breeding red wolf (Canis rufus)
نویسندگان
چکیده
Amanda M. Sparkman, Jennifer R. Adams, Todd D. Steury, Lisette P. Waits, and Dennis L. Murray Department of Biology, Trent University, Peterborough, ON K9J 7B8, Canada, Department of Fish and Wildlife Resources, University of Idaho, Moscow, ID 83844, USA, School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849, USA, Department of Fish and Wildlife Resources, University of Idaho, Moscow, ID 83844-1136, USA, and Department of Biology, Trent University, Peterborough, ON K9J 7B8, Canada
منابع مشابه
Helper effects on pup lifetime fitness in the cooperatively breeding red wolf (Canis rufus).
The evolutionary maintenance of cooperative breeding systems is thought to be a function of relative costs and benefits to breeders, helpers and juveniles. Beneficial effects of helpers on early-life survivorship and performance have been established in several species, but lifetime fitness benefits and/or costs of being helped remain unclear, particularly for long-lived species. We tested for ...
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In natural populations, the expression and severity of inbreeding depression can vary widely across taxa. Describing processes that influence the extent of inbreeding and inbreeding depression aid in our understanding of the evolutionary history of mating systems such as cooperative breeding and nonrandom mate selection. Such findings also help shape wildlife conservation theory because inbreed...
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Captive-breeding programs have been widely used in the conservation of imperiled species, but the effects of inbreeding, frequently expressed in traits related to fitness, are nearly unavoidable in small populations with few founders. Following its planned extirpation in the wild, the endangered red wolf (Canis rufus) was preserved in captivity with just 14 founders. In this study, we evaluated...
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By the 1970s, government-supported eradication campaigns reduced red wolves to a remnant population of less than 100 individuals on the southern border of Texas and Louisiana. Restoration efforts in the region were deemed unpromising because of predator-control programs and hybridization with coyotes. The U.S. Fish and Wildlife Service (USFWS) removed the last remaining red wolves from the wild...
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Among cooperatively breeding species, helpers are hypothesised to increase the survival of breeders by reducingbreederworkload inoffspring care and increasedgroupvigilance against predators. Furthermore, parental nepotism or other benefits of group living may provide a survival benefit to young that delay dispersal to help. We tested these hypotheses in the Karoo Scrub-robin (Cercotrichas coryp...
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